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CVE-2016-2391

Publication date 17 February 2016

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

5.0 · Medium

Score breakdown

The ohci_bus_start function in the USB OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via vectors related to multiple eof_timers.

Read the notes from the security team

Status

Package Ubuntu Release Status
qemu 16.04 LTS xenial
Fixed 1:2.5+dfsg-5ubuntu10.1
15.10 wily
Fixed 1:2.3+dfsg-5ubuntu9.4
15.04 vivid Ignored
14.04 LTS trusty
Fixed 2.0.0+dfsg-2ubuntu1.24
12.04 LTS precise Not in release
qemu-kvm 16.04 LTS xenial Not in release
15.10 wily Not in release
15.04 vivid Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Fixed 1.0+noroms-0ubuntu14.28

Notes

tyhicks

privileged users inside the guest can trigger a DoS but they could also simply shut down the guest

mdeslaur

in hw/usb-ohci.c in precise

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
qemu

Severity score breakdown

Parameter Value
Base score 5.0 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H